Create a dummy matrix from the elements in a vector

Create a dummy matrix based on the elements of a vector. Each column in the produced matrix is a dummy indicator.

vector_to_dummy(avector)

Arguments

avector

a numeric vector

Value

A matrix of dummy variables

Author

Gaston Sanchez

Examples

# let's say you have a list like this
num_vec = c(2, 3, 1, 4)

# get dummy matrix
vector_to_dummy(num_vec)
#>       [,1] [,2] [,3] [,4]
#>  [1,]    1    0    0    0
#>  [2,]    1    0    0    0
#>  [3,]    0    1    0    0
#>  [4,]    0    1    0    0
#>  [5,]    0    1    0    0
#>  [6,]    0    0    1    0
#>  [7,]    0    0    0    1
#>  [8,]    0    0    0    1
#>  [9,]    0    0    0    1
#> [10,]    0    0    0    1